Fire extinguisher



FIG. 1 is a front perspective view of a fire extinguisher according to my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a right side perspective view thereof;

FIG. 4 is a left side persepective view thereof;

FIG. 5 is a rear perspective view thereof; and,

FIG. 6 is a bottom perspective view thereof.

The broken lines on the fire extinguisher in the FIG. 3 view are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a fire extinguisher, as shown and described. 